--- _id: '651' abstract: - lang: eng text: ' Nanofiber mats can be produced by electrospinning from diverse polymers and polymer blends as well as with embedded ceramics, metals, etc. The large surface-to-volume ratio makes such nanofiber mats a well-suited substrate for tissue engineering and other cell growth experiments. Cell growth, however, is not only influenced by the substrate morphology, but also by the sterilization process applied before the experiment as well as by the chemical composition of the fibers. A former study showed that cell growth and adhesion are supported by polyacrylonitrile/gelatin nanofiber mats, while both factors are strongly reduced on pure polyacrylonitrile (PAN) nanofibers. Here we report on the influence of different PAN blends on cell growth and adhesion. Our study shows that adding ZnO to the PAN spinning solution impedes cell growth, while addition of maltodextrin/pea protein or casein/gelatin supports cell growth and adhesion.' article_type: original author: - first_name: Daria full_name: Wehlage, Daria last_name: Wehlage - first_name: Hannah full_name: Blattner, Hannah last_name: Blattner - first_name: Al full_name: Mamun, Al last_name: Mamun - first_name: Ines full_name: Kutzli, Ines last_name: Kutzli - first_name: Elise full_name: Diestelhorst, Elise last_name: Diestelhorst - first_name: Anke full_name: Rattenholl, Anke last_name: Rattenholl - first_name: Frank full_name: Gudermann, Frank last_name: Gudermann - first_name: Dirk full_name: Lütkemeyer, Dirk last_name: Lütkemeyer - first_name: Andrea full_name: Ehrmann, Andrea last_name: Ehrmann date_created: 2021-01-03T15:01:56Z date_updated: 2021-01-18T15:32:28Z ddc: - '620' department: - _id: '103' doi: 10.3934/bioeng.2020004 file: - access_level: open_access content_type: application/pdf creator: aehrmann date_created: 2021-01-03T15:00:59Z date_updated: 2021-01-03T15:00:59Z file_id: '652' file_name: _2020_Wehlage_AIMSbioeng7_43-54.pdf file_size: 1118818 relation: main_file success: 1 file_date_updated: 2021-01-03T15:00:59Z funded_apc: '1' has_accepted_license: '1' intvolume: ' 7' issue: '1' keyword: - electrospinning - nanofiber mat - autoclaving - cell growth - adherent cells - CHO cells - DMSO language: - iso: eng oa: '1' page: 43-54 publication: AIMS Bioengineering publication_identifier: issn: - 2375-1495 publication_status: published quality_controlled: '1' status: public title: Cell growth on electrospun nanofiber mats from polyacrylonitrile (PAN) blends type: journal_article user_id: '223776' volume: 7 year: '2020' ... --- _id: '573' abstract: - lang: eng text: Polyacrylonitrile belongs to the most often used precursors for carbon fibers. Using electrospinning, polyacrylonitrile nanofiber mats can be prepared and afterwards stabilized and carbonized to prepare carbon nanofiber mats which, by adding other materials, will be useful for several applications. One of these materials is TiO2, which has photocatalytic properties and can thus be used as a photocatalyst for photodegradation of dyes. Here, we report on a detailed study of electrospinning, stabilization, and carbonization of electrospun polyacrylonitrile/TiO2 mats with varying TiO2 content. Depending on the amount of TiO2 in the nanofibers, the fiber morphology changes strongly, indicating an upper limit for the preparation of carbon/TiO2 nanofibers with smooth surface, but offering an even increased inner surface of the rougher carbon/TiO2 nanofibers with increased TiO2 content due to better maintenance of the fibrous structure during stabilization. article_type: original author: - first_name: Lilia full_name: Sabantina, Lilia last_name: Sabantina - first_name: Robin full_name: Böttjer, Robin last_name: Böttjer - first_name: Daria full_name: Wehlage, Daria last_name: Wehlage - first_name: Timo full_name: Grothe, Timo id: '221330' last_name: Grothe orcid: 0000-0002-9099-4277 orcid_put_code_url: https://api.orcid.org/v2.0/0000-0002-9099-4277/work/94763731 - first_name: Michaela full_name: Klöcker, Michaela last_name: Klöcker - first_name: Francisco José full_name: García-Mateos, Francisco José last_name: García-Mateos - first_name: José full_name: Rodríguez-Mirasol, José last_name: Rodríguez-Mirasol - first_name: Tomás full_name: Cordero, Tomás last_name: Cordero - first_name: Andrea full_name: Ehrmann, Andrea id: '223776' last_name: Ehrmann orcid: 0000-0003-0695-3905 orcid_put_code_url: https://api.orcid.org/v2.0/0000-0003-0695-3905/work/94763733 citation: alphadin: 'Sabantina, Lilia ; Böttjer, Robin ; Wehlage, Daria ; Grothe, Timo ; Klöcker, Michaela ; García-Mateos, Francisco José ; Rodríguez-Mirasol, José ; Cordero, Tomás ; u. a.: Morphological study of stabilization and carbonization of polyacrylonitrile/TiO2 nanofiber mats. In: Journal of Engineered Fibers and Fabrics Bd. 14 (2019), S. 1–8' ama: Sabantina L, Böttjer R, Wehlage D, et al. Morphological study of stabilization and carbonization of polyacrylonitrile/TiO2 nanofiber mats. Journal of Engineered Fibers and Fabrics. 2019;14:1-8. doi:10.1177/1558925019862242 apa: Sabantina, L., Böttjer, R., Wehlage, D., Grothe, T., Klöcker, M., García-Mateos, F. J., … Ehrmann, A. (2019). Morphological study of stabilization and carbonization of polyacrylonitrile/TiO2 nanofiber mats. Journal of Engineered Fibers and Fabrics, 14, 1–8. https://doi.org/10.1177/1558925019862242 bibtex: '@article{Sabantina_Böttjer_Wehlage_Grothe_Klöcker_García-Mateos_Rodríguez-Mirasol_Cordero_Ehrmann_2019, title={ Morphological study of stabilization and carbonization of polyacrylonitrile/TiO2 nanofiber mats}, volume={14}, DOI={10.1177/1558925019862242}, journal={Journal of Engineered Fibers and Fabrics}, author={Sabantina, Lilia and Böttjer, Robin and Wehlage, Daria and Grothe, Timo and Klöcker, Michaela and García-Mateos, Francisco José and Rodríguez-Mirasol, José and Cordero, Tomás and Ehrmann, Andrea}, year={2019}, pages={1–8} }' chicago: 'Sabantina, Lilia, Robin Böttjer, Daria Wehlage, Timo Grothe, Michaela Klöcker, Francisco José García-Mateos, José Rodríguez-Mirasol, Tomás Cordero, and Andrea Ehrmann. “ Morphological Study of Stabilization and Carbonization of Polyacrylonitrile/TiO2 Nanofiber Mats.” Journal of Engineered Fibers and Fabrics 14 (2019): 1–8. https://doi.org/10.1177/1558925019862242.' ieee: L. Sabantina et al., “ Morphological study of stabilization and carbonization of polyacrylonitrile/TiO2 nanofiber mats,” Journal of Engineered Fibers and Fabrics, vol. 14, pp. 1–8, 2019. mla: Sabantina, Lilia, et al. “ Morphological Study of Stabilization and Carbonization of Polyacrylonitrile/TiO2 Nanofiber Mats.” Journal of Engineered Fibers and Fabrics, vol. 14, 2019, pp. 1–8, doi:10.1177/1558925019862242. short: L. Sabantina, R. Böttjer, D. Wehlage, T. Grothe, M. Klöcker, F.J. García-Mateos, J. Rodríguez-Mirasol, T. Cordero, A. Ehrmann, Journal of Engineered Fibers and Fabrics 14 (2019) 1–8. date_created: 2019-07-09T18:04:37Z date_updated: 2021-06-01T09:09:50Z department: - _id: '103' doi: 10.1177/1558925019862242 file: - access_level: open_access content_type: application/pdf creator: aehrmann date_created: 2019-07-09T18:03:14Z date_updated: 2019-07-09T18:03:14Z file_id: '574' file_name: _2019_Sabantina_JEFF14_1-8.pdf file_size: 1859126 relation: main_file success: 1 file_date_updated: 2019-07-09T18:03:14Z has_accepted_license: '1' intvolume: ' 14' keyword: - Polyacrylonitrile - PAN - TiO2 - nanofiber mat - electrospinning - composite - stabilization - carbonization language: - iso: eng oa: '1' page: 1-8 publication: Journal of Engineered Fibers and Fabrics publication_status: published quality_controlled: '1' status: public title: ' Morphological study of stabilization and carbonization of polyacrylonitrile/TiO2 nanofiber mats' type: journal_article user_id: '237837' volume: 14 year: '2019' ... --- _id: '599' abstract: - lang: eng text: 'Electrospinning is a well-known technology used to create nanofiber mats from diverse polymers and other materials. Due to their large surface-to-volume ratio, such nanofiber mats are often applied as air or water filters. Especially the latter, however, have to be mechanically highly stable, which is challenging for common nanofiber mats. One of the approaches to overcome this problem is gluing them on top of more rigid objects, integrating them in composites, or reinforcing them using other technologies to avoid damage due to the water pressure. Here, we suggest another solution. While direct 3D printing with the fused deposition modeling (FDM) technique on macroscopic textile fabrics has been under examination by several research groups for years, here we report on direct FDM printing on nanofiber mats for the first time. We show that by choosing the proper height of the printing nozzle above the nanofiber mat, printing is possible for raw polyacrylonitrile (PAN) nanofiber mats, as well as for stabilized and even more brittle carbonized material. Under these conditions, the adhesion between both parts of the composite is high enough to prevent the nanofiber mat from being peeled off the 3D printed polymer. Abrasion tests emphasize the significantly increased mechanical properties, while contact angle examinations reveal a hydrophilicity between the original values of the electrospun and the 3D printed materials. ' article_number: '1618' article_type: original author: - first_name: Tomasz full_name: Kozior, Tomasz last_name: Kozior - first_name: Marah full_name: Trabelsi, Marah last_name: Trabelsi - first_name: Al full_name: Mamun, Al last_name: Mamun - first_name: Lilia full_name: Sabantina, Lilia last_name: Sabantina - first_name: Andrea full_name: Ehrmann, Andrea id: '223776' last_name: Ehrmann orcid: 0000-0003-0695-3905 citation: alphadin: 'Kozior, Tomasz ; Trabelsi, Marah ; Mamun, Al ; Sabantina, Lilia ; Ehrmann, Andrea: Stabilization of Electrospun Nanofiber Mats Used for Filters by 3D Printing . In: Polymers Bd. 11, MDPI (2019), Nr. 10' ama: Kozior T, Trabelsi M, Mamun A, Sabantina L, Ehrmann A. Stabilization of Electrospun Nanofiber Mats Used for Filters by 3D Printing . Polymers. 2019;11(10). doi:10.3390/polym11101618 apa: Kozior, T., Trabelsi, M., Mamun, A., Sabantina, L., & Ehrmann, A. (2019). Stabilization of Electrospun Nanofiber Mats Used for Filters by 3D Printing . Polymers, 11(10). https://doi.org/10.3390/polym11101618 bibtex: '@article{Kozior_Trabelsi_Mamun_Sabantina_Ehrmann_2019, title={ Stabilization of Electrospun Nanofiber Mats Used for Filters by 3D Printing }, volume={11}, DOI={10.3390/polym11101618}, number={101618}, journal={Polymers}, publisher={MDPI}, author={Kozior, Tomasz and Trabelsi, Marah and Mamun, Al and Sabantina, Lilia and Ehrmann, Andrea}, year={2019} }' chicago: Kozior, Tomasz, Marah Trabelsi, Al Mamun, Lilia Sabantina, and Andrea Ehrmann. “ Stabilization of Electrospun Nanofiber Mats Used for Filters by 3D Printing .” Polymers 11, no. 10 (2019). https://doi.org/10.3390/polym11101618. ieee: T. Kozior, M. Trabelsi, A. Mamun, L. Sabantina, and A. Ehrmann, “ Stabilization of Electrospun Nanofiber Mats Used for Filters by 3D Printing ,” Polymers, vol. 11, no. 10, 2019. mla: Kozior, Tomasz, et al. “ Stabilization of Electrospun Nanofiber Mats Used for Filters by 3D Printing .” Polymers, vol. 11, no. 10, 1618, MDPI, 2019, doi:10.3390/polym11101618. short: T. Kozior, M. Trabelsi, A. Mamun, L. Sabantina, A. Ehrmann, Polymers 11 (2019). date_created: 2019-10-06T09:19:53Z date_updated: 2021-01-18T15:32:28Z ddc: - '670' department: - _id: '103' doi: 10.3390/polym11101618 file: - access_level: open_access content_type: application/pdf creator: aehrmann date_created: 2019-10-06T09:18:09Z date_updated: 2019-10-06T09:18:09Z file_id: '600' file_name: _2019_Kozior_Polymers11_1618.pdf file_size: 1442387 relation: main_file success: 1 file_date_updated: 2019-10-06T09:18:09Z funded_apc: '1' has_accepted_license: '1' intvolume: ' 11' issue: '10' keyword: - nanofiber mat - electrospinning - water filter - 3D printing - FDM printing - adhesion - stabilization - carbonization language: - iso: eng oa: '1' publication: Polymers publication_status: published publisher: MDPI quality_controlled: '1' status: public title: ' Stabilization of Electrospun Nanofiber Mats Used for Filters by 3D Printing ' type: journal_article user_id: '237837' volume: 11 year: '2019' ... --- _id: '623' abstract: - lang: eng text: Electrospinning is a frequently used method to prepare air and water filters. Electrospun nanofiber mats can have very small pores, allowing for filtering of even the smallest particles or molecules. In addition, their high surface-to-volume ratio allows for the integration of materials which may additionally treat the filtered material through photo-degradation, possess antimicrobial properties, etc., thus enhancing their applicability. However, the fine nanofiber mats are prone to mechanical damage. Possible solutions include reinforcement by embedding them in composites or gluing them onto layers that are more mechanically stable. In a previous study, we showed that it is generally possible to stabilize electrospun nanofiber mats by 3D printing rigid polymer layers onto them. Since this procedure is not technically easy and needs some experience to avoid delamination as well as damaging the nanofiber mat by the hot nozzle, here we report on the reversed technique (i.e., first 3D printing a rigid scaffold and subsequently electrospinning the nanofiber mat on top of it). We show that, although the adhesion between both materials is insufficient in the case of a common rigid printing polymer, nanofiber mats show strong adhesion to 3D printed scaffolds from thermoplastic polyurethane (TPU). This paves the way to a second approach of combining 3D printing and electrospinning in order to prepare mechanically stable filters with a nanofibrous surface. article_number: '2034' article_type: original author: - first_name: Tomasz full_name: Kozior, Tomasz last_name: Kozior - first_name: Al full_name: Mamun, Al last_name: Mamun - first_name: Marah full_name: Trabelsi, Marah last_name: Trabelsi - first_name: Martin full_name: Wortmann, Martin last_name: Wortmann - first_name: Sabantina full_name: Lilia, Sabantina last_name: Lilia - first_name: Andrea full_name: Ehrmann, Andrea last_name: Ehrmann date_created: 2021-01-03T13:28:16Z date_updated: 2021-01-18T15:32:28Z ddc: - '620' department: - _id: '103' doi: 10.3390/polym11122034 file: - access_level: open_access content_type: application/pdf creator: aehrmann date_created: 2021-01-03T13:27:23Z date_updated: 2021-01-03T13:27:23Z file_id: '624' file_name: _2019_Kozior_Polymers11_02034_corr.pdf file_size: 4911061 relation: main_file success: 1 file_date_updated: 2021-01-03T13:27:23Z funded_apc: '1' has_accepted_license: '1' intvolume: ' 11' issue: '12' keyword: - electrospinning - 3D printing - FDM printing - nanofiber mat - adhesion - water filter language: - iso: eng oa: '1' publication: Polymers publication_identifier: issn: - 2073-4360 publication_status: published quality_controlled: '1' status: public title: Electrospinning on 3D Printed Polymers for Mechanically Stabilized Filter Composites type: journal_article user_id: '223776' volume: 11 year: '2019' ... --- _id: '628' abstract: - lang: eng text: Electrospun nanofiber mats show a very high surface-to-volume ratio as well as good mechanical properties and are thus typically used as filters or wound dressings, for drug delivery or as catalysts. Their optical properties, however, are only scarcely investigated. Due to the fine fibers with typical diameters of a few hundred nanometers, they tend to scattering visible light strongly. When wetted, however, they can become nearly invisible due to index-matching with the solvent and benefiting from the low thickness of the mats of usually only few microns. Here we report on polyacrylonitrile nanofiber mats, electrospun solely or blended with biopolymers, ceramics and other materials to modify their morphological and optical properties. Spectroscopic investigations of wetted nanofiber mats revealed different drying processes for different nanofiber morphologies and materials. On the other hand, some nanofiber mats were dissolved and the nano-mat forming process was evaluated spectroscopically, underlining the significant difference in the optical properties of nanofiber mats and nano-membranes of identical areal weights. With that we show the capability of the nanofiber mats for reversible transmission as well as permanent transmission tuning. article_number: '164081' article_type: original author: - first_name: Eugen full_name: Kerker, Eugen last_name: Kerker - first_name: Dominik full_name: Steinhäußer, Dominik last_name: Steinhäußer - first_name: Al full_name: Mamun, Al last_name: Mamun - first_name: Marah full_name: Trabelsi, Marah last_name: Trabelsi - first_name: Johannes full_name: Fiedler, Johannes last_name: Fiedler - first_name: Lilia full_name: Sabantina, Lilia last_name: Sabantina - first_name: Irén full_name: Juhász Junger, Irén last_name: Juhász Junger - first_name: Manuela full_name: Schiek, Manuela last_name: Schiek - first_name: Andrea full_name: Ehrmann, Andrea last_name: Ehrmann - first_name: Reinhard full_name: Kaschuba, Reinhard last_name: Kaschuba date_created: 2021-01-03T13:35:38Z date_updated: 2021-01-18T15:32:28Z department: - _id: '103' doi: 10.1016/j.ijleo.2019.164081 intvolume: ' 208' keyword: - Electrospinning - Nanofiber mat - Nano-membrane - Solvent - Spectroscopy - Scattering - Tunable transmittance language: - iso: eng publication: Optik publication_identifier: issn: - 0030-4026 publication_status: published quality_controlled: '1' status: public title: Spectroscopic investigation of highly-scattering nanofiber mats during drying and film formation type: journal_article user_id: '223776' volume: 208 year: '2019' ... --- _id: '570' abstract: - lang: eng text: 'TiO2 is a semiconductor that is commonly used in dye-sensitized solar cells (DSSCs). However, the necessity of sintering the TiO2 layer is usually problematic due to the desired temperatures of typically 500 °C in cells that are prepared on polymeric or textile electrodes. This is why textile-based DSSCs often use metal fibers or metallic woven fabrics as front electrodes on which the TiO2 is coated. Alternatively, several research groups investigate the possibilities to reduce the necessary sintering temperatures by chemical or other pre-treatments of the TiO2. Here, we report on a simple method to avoid the sintering step by using a nanofiber mat as a matrix embedding TiO2 nanoparticles. The TiO2 layer can be dyed with natural dyes, resulting in a similar bathochromic shift of the UV/Vis spectrum, as it is known from sintered TiO2 on glass substrates, which indicates an equivalent chemical bonding. Our results indicate a new possibility for producing textile-based DSSCs with TiO2, even on textile fabrics that are not high-temperature resistant. ' article_number: '60' article_type: original author: - first_name: Andrea full_name: Ehrmann, Andrea id: '223776' last_name: Ehrmann orcid: 0000-0003-0695-3905 - first_name: Al full_name: Mamun, Al last_name: Mamun - first_name: Marah full_name: Trabelsi, Marah last_name: Trabelsi - first_name: Michaela full_name: Klöcker, Michaela last_name: Klöcker - first_name: Lilia full_name: Sabantina, Lilia last_name: Sabantina - first_name: Christina full_name: Großerhode, Christina last_name: Großerhode - first_name: Tomasz full_name: Blachowicz, Tomasz last_name: Blachowicz - first_name: Georg full_name: Grötsch, Georg last_name: Grötsch - first_name: Carsten full_name: Cornelißen, Carsten last_name: Cornelißen - first_name: Almuth full_name: Streitenberger, Almuth last_name: Streitenberger citation: alphadin: 'Ehrmann, Andrea ; Mamun, Al ; Trabelsi, Marah ; Klöcker, Michaela ; Sabantina, Lilia ; Großerhode, Christina ; Blachowicz, Tomasz ; Grötsch, Georg ; u. a.: Electrospun nanofiber mats with embedded non-sintered TiO2 for dye-sensitized solar cells (DSSCs). In: Fibers Bd. 7 (2019), Nr. 7' ama: Ehrmann A, Mamun A, Trabelsi M, et al. Electrospun nanofiber mats with embedded non-sintered TiO2 for dye-sensitized solar cells (DSSCs). Fibers. 2019;7(7). doi:10.3390/fib7070060 apa: Ehrmann, A., Mamun, A., Trabelsi, M., Klöcker, M., Sabantina, L., Großerhode, C., … Streitenberger, A. (2019). Electrospun nanofiber mats with embedded non-sintered TiO2 for dye-sensitized solar cells (DSSCs). Fibers, 7(7). https://doi.org/10.3390/fib7070060 bibtex: '@article{Ehrmann_Mamun_Trabelsi_Klöcker_Sabantina_Großerhode_Blachowicz_Grötsch_Cornelißen_Streitenberger_2019, title={Electrospun nanofiber mats with embedded non-sintered TiO2 for dye-sensitized solar cells (DSSCs)}, volume={7}, DOI={10.3390/fib7070060}, number={760}, journal={Fibers}, author={Ehrmann, Andrea and Mamun, Al and Trabelsi, Marah and Klöcker, Michaela and Sabantina, Lilia and Großerhode, Christina and Blachowicz, Tomasz and Grötsch, Georg and Cornelißen, Carsten and Streitenberger, Almuth}, year={2019} }' chicago: Ehrmann, Andrea, Al Mamun, Marah Trabelsi, Michaela Klöcker, Lilia Sabantina, Christina Großerhode, Tomasz Blachowicz, Georg Grötsch, Carsten Cornelißen, and Almuth Streitenberger. “Electrospun Nanofiber Mats with Embedded Non-Sintered TiO2 for Dye-Sensitized Solar Cells (DSSCs).” Fibers 7, no. 7 (2019). https://doi.org/10.3390/fib7070060. ieee: A. Ehrmann et al., “Electrospun nanofiber mats with embedded non-sintered TiO2 for dye-sensitized solar cells (DSSCs),” Fibers, vol. 7, no. 7, 2019. mla: Ehrmann, Andrea, et al. “Electrospun Nanofiber Mats with Embedded Non-Sintered TiO2 for Dye-Sensitized Solar Cells (DSSCs).” Fibers, vol. 7, no. 7, 60, 2019, doi:10.3390/fib7070060. short: A. Ehrmann, A. Mamun, M. Trabelsi, M. Klöcker, L. Sabantina, C. Großerhode, T. Blachowicz, G. Grötsch, C. Cornelißen, A. Streitenberger, Fibers 7 (2019). date_created: 2019-07-04T19:09:23Z date_updated: 2021-01-18T15:32:27Z department: - _id: '103' doi: 10.3390/fib7070060 intvolume: ' 7' issue: '7' keyword: - TiO2 - dye-sensitized solar cell (DSSC) - textile-based DSSC - electrospinning - nanofiber mat - polyacrylonitrile (PAN) language: - iso: eng publication: Fibers publication_status: published quality_controlled: '1' status: public title: Electrospun nanofiber mats with embedded non-sintered TiO2 for dye-sensitized solar cells (DSSCs) type: journal_article user_id: '223776' volume: 7 year: '2019' ...